Re: [osm-nyc] NYC Shops/Amenities Heatmap

From: Serge
Sent on: Saturday, May 11, 2013 5:57 PM
The map is a map of all the nodes which have either an amenity or shop 
key in their tags. This is a good approximation of all POIs in an area, 
which in itself is a good aproximation of how well mapped an areas is in 

Data collection of this sort helps in a variety of ways. Firstly, it 
makes OSM more useful as a general purpose map by placing shops and 
restaurants on the map.

POI collection also helps with the often mentioned address issue. The 
more POIs that are collected with full addresses, the better the 
geocoder can be at determining where other objects are in relation to 
that object. In other words, the more POIs you enter with addresses, the 
more accurate OSM becomes in general about address data.

For me, this map is a useful visualization of where the map could use 
some love. The city should be pretty dense with POIs except for green 
spaces and some more residential neighborhoods in the outer boroughs.

For POIs, you have to go out and do on the ground surveying. You can't 
capture the names of stores, types of restaurants, or addresses from 
aerial imagery (at least unclassified aerial imagery).

If you aren't sure how to do good POI collection, we'll be doing this at 
the mapping party, so you'll be able to do it by the end of that. If 
that's not soon enough, maybe we can talk about POI collection at the 
next virtual meeting this week.

- Serge

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